Function getChordFretSpan

getChordFretSpan(input: string): number
Returns how many frets does the passed chord take.
Parameters
- input: string
  The chord input
Returns number
The chord fret span
Example
```
getChordFretSpan("x32010") // returns 3
```
Example
```
getChordFretSpan("x5454x") // returns 3
```
Example
```
getChordFretSpan("xx5432") // returns 4
```
- Defined in packages/fretboard/src/chords/chords.ts:102